Topic 2 - Forces And Motion - Vectors And Scalars Flashcards
What is a Vector?
A Vector has magnitude and direction.
What is a Scalar?
A Scalar has just magnitude.
Can scalars be negative?
Generally, scalars cannot be negative.
Can vectors be negative?
Yes, vectors can be negative as a certain direction is positive.
Is speed a scalar or a vector?
Speed is a scalar.
Is velocity a scalar or a vector?
Velocity is a vector.
Is distance a scalar or a vector?
Distance is a scalar.
Is displacement a scalar or a vector?
Displacement is a vector.
Is time a scalar or a vector?
Time is a scalar.
Is acceleration a scalar or a vector?
Acceleration is a vector.
Is force a scalar or a vector?
Force is a vector.
Is mass a scalar or a vector?
Mass is a scalar.
Is momentum a scalar or a vector?
Momentum is a vector.
Is energy a scalar or a vector?
Energy is a scalar.
What happens to the displacement of a ball thrown off a cliff at the height of the cliff?
The displacement is 0 at the height of the cliff.
What is the displacement of a ball above the cliff?
Positive displacement.
What is the displacement of a ball below the clifftop?
Negative displacement.
In long answer questions, what can you decide regarding the ‘O’ point of a vector?
You may be able to decide where the ‘O’ point of a vector may lie.
How can you set zero for displacement in the context of a cliff?
You could set zero to be the bottom of the cliff.
What is speed when given a direction called?
Velocity.
Fill in the blank: Speed is only velocity when given a direction, so thrown 10 m/s is its speed but thrown ______ at 30° above the horizontal is the velocity.
10 m/s
